Patents by Inventor Youzou Majima

Youzou Majima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6390443
    Abstract: A metallic member including not more than 0.6% C, 12 to 19% Cr, 6 to 12% Ni, not more than 2% Mn, not more than 2% Mo, not more than 1% Nb and the balance being Fe and inevitable impurities, where Hirayama's equivalent H eq=[Ni %]+1.05 [Mn %]+0.65 [Cr %]+0.35 [Si %]+12.6 [C %] is 20 to 23%; Nickel equivalent Ni eq=[Ni %]+30 [C %]+0.5 [Mn %] is 9 to 12%, and Chromium equivalent Cr eq=[Cr %]+[Mo %]+1.5 [Si %]+0.5 [Nb %] is 16 to 19, wherein % is by weight, is made to have at least one ferromagnetized part having a magnetic flux density B4000 of not less than 0.3 T and at least one non-magnetized part having a relative magnetic permeability &mgr; of not more than 1.2 at a temperature of not less than −40° C., as continuously and integrally formed.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: May 21, 2002
    Assignees: Nippondenso Co. Ltd., Hitachi Metals, Ltd.
    Inventors: Yoshitada Katayama, Youzou Majima, Takayuki Shibata, Keizo Takeuchi, Toshiaki Terada, Shinya Sugiura, Hakaru Sasaki, Tsutomu Inui
  • Patent number: 5129489
    Abstract: A variable-damping-force shock absorber includes a piezoelectric actuator for producing a displacement, a hydraulic pressure chamber filled with a working oil and having a volume variable in response to the displacement produced by said piezoelectric actuator, and a plunger slidably disposed in a sleeve and reciprocally movable in response to a change in the volume of said hydraulic pressure chamber. The sleeve and said plunger define therebetween a gap communicating with said hydraulic pressure chamber. A supply passage for supplying a working oil from an external working oil source into said hydraulic pressure chamber extends through the gap. A leakage of the working oil from the hydraulic pressure chamber through the gap can automatically be compensated for by working oil supplied through the supply passage. Since the working oil leaks from and is supplied into the hydraulic pressure chamber through the gap, the leakage and supply of the working oil are kept in equilibrium.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: July 14, 1992
    Assignee: Nippondenso Co., Ltd., 1-1
    Inventors: Youzou Majima, Yutaka Suzuki, Eiju Matsunaga, Toshinobu Ishida, Sigeru Kamiya, Yasumasa Hagiwara, Masatoshi Kuroyanagi
  • Patent number: 5089967
    Abstract: An auxiliary steering control system in connection with an anti-skid control system for use in a motor vehicle with two parts of left and right wheels, the anti-skid control system being adapted to independently control braking pressures for at least one pair of left and right wheels and including a braking actuator for adjusting braking pressures to be applied to the pair of left and right wheels. The braking actuator is controlled so that the braking pressures therefor approach the target braking forces determined on the basis of the rotational speeds of the wheels. The steering control device includes a steering actuator for adjusting steering angles of the pair of left and right wheels in response to steering control signals from a steering angle control unit.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: February 18, 1992
    Assignee: Nippondenso Co., Ltd.
    Inventors: Satoshi Haseda, Shinji Hiraiwa, Youzou Majima, Fumiaki Murakami, Masatoshi Kuroyanagi, Takaji Murakawa
  • Patent number: 4802562
    Abstract: The braking system comprising an input mechanism, such as a brake pedal or a brake lever, actuated by a vehicle operator during brake application. A sensor senses the pressure exerted on the brake pedal and delivers a first electrical signal in accordance with that pressure. The system also includes a source of brake fluid under a constant fluid pressure and pressure modulators in fluid communication with the source and the wheel cylinders. An electronic control unit responds to the first signal and delivers to the pressure modulators a second electrical signal proportional to the first signal to cause the pressure modulators to communicate to the wheel cylinders a fluid pressure proportional to the second signal to apply the brake with a braking force proportional to the applied pressure. The braking system also provides an anti-skid function, traction control function, and braking force proportioning function.
    Type: Grant
    Filed: March 13, 1987
    Date of Patent: February 7, 1989
    Assignee: Nippondenso Co., Ltd.
    Inventors: Masatoshi Kuroyanagi, Kazuma Matsui, Youzou Majima, Fumiaki Murakami
  • Patent number: 4747614
    Abstract: The hydraulic cylinder mechanism has a main piston which has a piston portion, two sub-pistons which is so located that the sub-pistons can hold the piston portion, control pressure chambers which are formed between the sub-piston and the piston portion, and holding pressure chambers which are formed at behind of the sub-piston. The hydraulic cylinder mechanism controls automotive rear wheel alignment when the main piston moves axially according to the pressure in the control pressure chambers and can maintain its neutral position when the pressure in the holding chamber is applied to the sub-piston so that holds the piston portion.
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: May 31, 1988
    Assignee: Nippondenso Co., Ltd.
    Inventors: Masatoshi Kuroyanagi, Kazuma Matsui, Youzou Majima, Fumiaki Murakami